Add home hero with intro and buttons from the body, next-event card and page tiles

Elternbeirat.Web/Features/Events/EventList.razor.cs

@@ -20,6 +20,9 @@ public partial class EventList
     [Inject]
     private ILogger<EventList> Logger { get; set; } = null!;
 
+    [Inject]
+    private TimeProvider Time { get; set; } = null!;
+
     [CascadingParameter]
     private HttpContext? HttpContext { get; set; }
 
@@ -62,13 +65,8 @@ public partial class EventList
 
         // Split into upcoming and past by date, so an event earlier today still
         // counts as upcoming. Upcoming earliest first, past most recent first.
-        var today = DateOnly.FromDateTime(DateTime.Today);
-        _upcomingEvents =
-        [
-            .. events
-                .Where(@event => DateOnly.FromDateTime(@event.Start) >= today)
-                .OrderBy(@event => @event.Start)
-        ];
+        var today = BerlinClock.Today(Time);
+        _upcomingEvents = [.. UpcomingEvents.From(events, today)];
         _pastEvents =
         [
             .. events

Elternbeirat.Web/Features/Events/UpcomingEvents.cs

@@ -0,0 +1,30 @@
+using Elternbeirat.Contracts;
+
+namespace Elternbeirat.Web.Features.Events;
+
+/// <summary>
+///     Picks the events that still lie ahead.
+/// </summary>
+/// <remarks>
+///     The events page, the events embed and the "next event" card on the home page
+///     all need the same answer to "what is coming up?". Keeping the rule here means a
+///     change to it (e.g. hiding an event once it has ended) reaches all three.
+/// </remarks>
+/// <seealso cref="Shared.BerlinClock"/>
+public static class UpcomingEvents
+{
+    /// <summary>
+    ///     Returns the events on or after <paramref name="today"/>, earliest first.
+    /// </summary>
+    /// <param name="events">All events, in any order.</param>
+    /// <param name="today">The current day, from <see cref="Shared.BerlinClock.Today"/>.</param>
+    /// <returns>The upcoming events, ordered by start.</returns>
+    /// <remarks>
+    ///     Compared by day, not by the minute: an event earlier today still counts as
+    ///     upcoming, so a visitor who checks during the evening's meeting still finds it.
+    /// </remarks>
+    public static IEnumerable<Event> From(IEnumerable<Event> events, DateOnly today) =>
+        events
+            .Where(@event => DateOnly.FromDateTime(@event.Start) >= today)
+            .OrderBy(@event => @event.Start);
+}